#include <algorithm>
#include <cstdio>
#include <iostream>
#include <absl/strings/escaping.h>
#include <fcntl.h>
#include <glog/logging.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "libmain/shared.hh"
#include "libstore/derivations.hh"
#include "libstore/globals.hh"
#include "libstore/local-store.hh"
#include "libstore/serve-protocol.hh"
#include "libstore/worker-protocol.hh"
#include "libutil/archive.hh"
#include "libutil/monitor-fd.hh"
#include "libutil/util.hh"
#include "nix-store/dotgraph.hh"
#include "nix-store/graphml.hh"
#include "nix/legacy.hh"
#if HAVE_SODIUM
#include <sodium.h>
#endif
using namespace nix;
using std::cin;
using std::cout;
// TODO(tazjin): clang-tidy's performance lints don't like this, but
// the automatic fixes fail (it seems that some of the ops want to own
// the args for whatever reason)
using Operation = void (*)(Strings, Strings);
static Path gcRoot;
static int rootNr = 0;
static bool indirectRoot = false;
static bool noOutput = false;
static std::shared_ptr<Store> store;
ref<LocalStore> ensureLocalStore() {
auto store2 = std::dynamic_pointer_cast<LocalStore>(store);
if (!store2) {
throw Error("you don't have sufficient rights to use this command");
}
return ref<LocalStore>(store2);
}
static Path useDeriver(Path path) {
if (isDerivation(path)) {
return path;
}
Path drvPath = store->queryPathInfo(path)->deriver;
if (drvPath.empty()) {
throw Error(format("deriver of path '%1%' is not known") % path);
}
return drvPath;
}
/* Realise the given path. For a derivation that means build it; for
other paths it means ensure their validity. */
static PathSet realisePath(Path path, bool build = true) {
DrvPathWithOutputs p = parseDrvPathWithOutputs(path);
auto store2 = std::dynamic_pointer_cast<LocalFSStore>(store);
if (isDerivation(p.first)) {
if (build) {
store->buildPaths({path});
}
Derivation drv = store->derivationFromPath(p.first);
rootNr++;
if (p.second.empty()) {
for (auto& i : drv.outputs) {
p.second.insert(i.first);
}
}
PathSet outputs;
for (auto& j : p.second) {
auto i = drv.outputs.find(j);
if (i == drv.outputs.end()) {
throw Error(
format("derivation '%1%' does not have an output named '%2%'") %
p.first % j);
}
Path outPath = i->second.path;
if (store2) {
if (gcRoot.empty()) {
printGCWarning();
} else {
Path rootName = gcRoot;
if (rootNr > 1) {
rootName += "-" + std::to_string(rootNr);
}
if (i->first != "out") {
rootName += "-" + i->first;
}
outPath = store2->addPermRoot(outPath, rootName, indirectRoot);
}
}
outputs.insert(outPath);
}
return outputs;
}
if (build) {
store->ensurePath(path);
} else if (!store->isValidPath(path)) {
throw Error(format("path '%1%' does not exist and cannot be created") %
path);
}
if (store2) {
if (gcRoot.empty()) {
printGCWarning();
} else {
Path rootName = gcRoot;
rootNr++;
if (rootNr > 1) {
rootName += "-" + std::to_string(rootNr);
}
path = store2->addPermRoot(path, rootName, indirectRoot);
}
}
return {path};
}
/* Realise the given paths. */
static void opRealise(Strings opFlags, Strings opArgs) {
bool dryRun = false;
BuildMode buildMode = bmNormal;
bool ignoreUnknown = false;
for (auto& i : opFlags) {
if (i == "--dry-run") {
dryRun = true;
} else if (i == "--repair") {
buildMode = bmRepair;
} else if (i == "--check") {
buildMode = bmCheck;
} else if (i == "--ignore-unknown") {
ignoreUnknown = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
Paths paths;
for (auto& i : opArgs) {
DrvPathWithOutputs p = parseDrvPathWithOutputs(i);
paths.push_back(makeDrvPathWithOutputs(
store->followLinksToStorePath(p.first), p.second));
}
unsigned long long downloadSize = 0;
unsigned long long narSize = 0;
PathSet willBuild;
PathSet willSubstitute;
PathSet unknown;
store->queryMissing(PathSet(paths.begin(), paths.end()), willBuild,
willSubstitute, unknown, downloadSize, narSize);
if (ignoreUnknown) {
Paths paths2;
for (auto& i : paths) {
if (unknown.find(i) == unknown.end()) {
paths2.push_back(i);
}
}
paths = paths2;
unknown = PathSet();
}
if (settings.printMissing) {
printMissing(ref<Store>(store), willBuild, willSubstitute, unknown,
downloadSize, narSize);
}
if (dryRun) {
return;
}
/* Build all paths at the same time to exploit parallelism. */
store->buildPaths(PathSet(paths.begin(), paths.end()), buildMode);
if (!ignoreUnknown) {
for (auto& i : paths) {
PathSet paths = realisePath(i, false);
if (!noOutput) {
for (auto& j : paths) {
cout << format("%1%\n") % j;
}
}
}
}
}
/* Add files to the Nix store and print the resulting paths. */
static void opAdd(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
for (auto& i : opArgs) {
cout << format("%1%\n") % store->addToStore(baseNameOf(i), i);
}
}
/* Preload the output of a fixed-output derivation into the Nix
store. */
static void opAddFixed(Strings opFlags, Strings opArgs) {
bool recursive = false;
for (auto& i : opFlags) {
if (i == "--recursive") {
recursive = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
if (opArgs.empty()) {
throw UsageError("first argument must be hash algorithm");
}
HashType hashAlgo = parseHashType(opArgs.front());
opArgs.pop_front();
for (auto& i : opArgs) {
cout << format("%1%\n") %
store->addToStore(baseNameOf(i), i, recursive, hashAlgo);
}
}
/* Hack to support caching in `nix-prefetch-url'. */
static void opPrintFixedPath(Strings opFlags, Strings opArgs) {
bool recursive = false;
for (auto i : opFlags) {
if (i == "--recursive") {
recursive = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
if (opArgs.size() != 3) {
throw UsageError(format("'--print-fixed-path' requires three arguments"));
}
auto i = opArgs.begin();
HashType hashAlgo = parseHashType(*i++);
std::string hash = *i++;
std::string name = *i++;
cout << format("%1%\n") %
store->makeFixedOutputPath(recursive, Hash(hash, hashAlgo), name);
}
static PathSet maybeUseOutputs(const Path& storePath, bool useOutput,
bool forceRealise) {
if (forceRealise) {
realisePath(storePath);
}
if (useOutput && isDerivation(storePath)) {
Derivation drv = store->derivationFromPath(storePath);
PathSet outputs;
for (auto& i : drv.outputs) {
outputs.insert(i.second.path);
}
return outputs;
}
return {storePath};
}
/* Some code to print a tree representation of a derivation dependency
graph. Topological sorting is used to keep the tree relatively
flat. */
const std::string treeConn = "+---";
const std::string treeLine = "| ";
const std::string treeNull = " ";
static void printTree(const Path& path, const std::string& firstPad,
const std::string& tailPad, PathSet& done) {
if (done.find(path) != done.end()) {
cout << format("%1%%2% [...]\n") % firstPad % path;
return;
}
done.insert(path);
cout << format("%1%%2%\n") % firstPad % path;
auto references = store->queryPathInfo(path)->references;
/* Topologically sort under the relation A < B iff A \in
closure(B). That is, if derivation A is an (possibly indirect)
input of B, then A is printed first. This has the effect of
flattening the tree, preventing deeply nested structures. */
Paths sorted = store->topoSortPaths(references);
reverse(sorted.begin(), sorted.end());
for (auto i = sorted.begin(); i != sorted.end(); ++i) {
auto j = i;
++j;
printTree(*i, tailPad + treeConn,
j == sorted.end() ? tailPad + treeNull : tailPad + treeLine,
done);
}
}
/* Perform various sorts of queries. */
static void opQuery(Strings opFlags, Strings opArgs) {
enum QueryType {
qDefault,
qOutputs,
qRequisites,
qReferences,
qReferrers,
qReferrersClosure,
qDeriver,
qBinding,
qHash,
qSize,
qTree,
qGraph,
qGraphML,
qResolve,
qRoots
};
QueryType query = qDefault;
bool useOutput = false;
bool includeOutputs = false;
bool forceRealise = false;
std::string bindingName;
for (auto& i : opFlags) {
QueryType prev = query;
if (i == "--outputs") {
query = qOutputs;
} else if (i == "--requisites" || i == "-R") {
query = qRequisites;
} else if (i == "--references") {
query = qReferences;
} else if (i == "--referrers" || i == "--referers") {
query = qReferrers;
} else if (i == "--referrers-closure" || i == "--referers-closure") {
query = qReferrersClosure;
} else if (i == "--deriver" || i == "-d") {
query = qDeriver;
} else if (i == "--binding" || i == "-b") {
if (opArgs.empty()) {
throw UsageError("expected binding name");
}
bindingName = opArgs.front();
opArgs.pop_front();
query = qBinding;
} else if (i == "--hash") {
query = qHash;
} else if (i == "--size") {
query = qSize;
} else if (i == "--tree") {
query = qTree;
} else if (i == "--graph") {
query = qGraph;
} else if (i == "--graphml") {
query = qGraphML;
} else if (i == "--resolve") {
query = qResolve;
} else if (i == "--roots") {
query = qRoots;
} else if (i == "--use-output" || i == "-u") {
useOutput = true;
} else if (i == "--force-realise" || i == "--force-realize" || i == "-f") {
forceRealise = true;
} else if (i == "--include-outputs") {
includeOutputs = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
if (prev != qDefault && prev != query) {
throw UsageError(format("query type '%1%' conflicts with earlier flag") %
i);
}
}
if (query == qDefault) {
query = qOutputs;
}
RunPager pager;
switch (query) {
case qOutputs: {
for (auto& i : opArgs) {
i = store->followLinksToStorePath(i);
if (forceRealise) {
realisePath(i);
}
Derivation drv = store->derivationFromPath(i);
for (auto& j : drv.outputs) {
cout << format("%1%\n") % j.second.path;
}
}
break;
}
case qRequisites:
case qReferences:
case qReferrers:
case qReferrersClosure: {
PathSet paths;
for (auto& i : opArgs) {
PathSet ps = maybeUseOutputs(store->followLinksToStorePath(i),
useOutput, forceRealise);
for (auto& j : ps) {
if (query == qRequisites) {
store->computeFSClosure(j, paths, false, includeOutputs);
} else if (query == qReferences) {
for (auto& p : store->queryPathInfo(j)->references) {
paths.insert(p);
}
} else if (query == qReferrers) {
store->queryReferrers(j, paths);
} else if (query == qReferrersClosure) {
store->computeFSClosure(j, paths, true);
}
}
}
Paths sorted = store->topoSortPaths(paths);
for (auto i = sorted.rbegin(); i != sorted.rend(); ++i) {
cout << format("%s\n") % *i;
}
break;
}
case qDeriver:
for (auto& i : opArgs) {
Path deriver =
store->queryPathInfo(store->followLinksToStorePath(i))->deriver;
cout << format("%1%\n") %
(deriver.empty() ? "unknown-deriver" : deriver);
}
break;
case qBinding:
for (auto& i : opArgs) {
Path path = useDeriver(store->followLinksToStorePath(i));
Derivation drv = store->derivationFromPath(path);
auto j = drv.env.find(bindingName);
if (j == drv.env.end()) {
throw Error(
format(
"derivation '%1%' has no environment binding named '%2%'") %
path % bindingName);
}
cout << format("%1%\n") % j->second;
}
break;
case qHash:
case qSize:
for (auto& i : opArgs) {
PathSet paths = maybeUseOutputs(store->followLinksToStorePath(i),
useOutput, forceRealise);
for (auto& j : paths) {
auto info = store->queryPathInfo(j);
if (query == qHash) {
assert(info->narHash.type == htSHA256);
cout << fmt("%s\n", info->narHash.to_string(Base32));
} else if (query == qSize) {
cout << fmt("%d\n", info->narSize);
}
}
}
break;
case qTree: {
PathSet done;
for (auto& i : opArgs) {
printTree(store->followLinksToStorePath(i), "", "", done);
}
break;
}
case qGraph: {
PathSet roots;
for (auto& i : opArgs) {
PathSet paths = maybeUseOutputs(store->followLinksToStorePath(i),
useOutput, forceRealise);
roots.insert(paths.begin(), paths.end());
}
printDotGraph(ref<Store>(store), roots);
break;
}
case qGraphML: {
PathSet roots;
for (auto& i : opArgs) {
PathSet paths = maybeUseOutputs(store->followLinksToStorePath(i),
useOutput, forceRealise);
roots.insert(paths.begin(), paths.end());
}
printGraphML(ref<Store>(store), roots);
break;
}
case qResolve: {
for (auto& i : opArgs) {
cout << format("%1%\n") % store->followLinksToStorePath(i);
}
break;
}
case qRoots: {
PathSet referrers;
for (auto& i : opArgs) {
store->computeFSClosure(
maybeUseOutputs(store->followLinksToStorePath(i), useOutput,
forceRealise),
referrers, true, settings.gcKeepOutputs,
settings.gcKeepDerivations);
}
Roots roots = store->findRoots(false);
for (auto& [target, links] : roots) {
if (referrers.find(target) != referrers.end()) {
for (auto& link : links) {
cout << format("%1% -> %2%\n") % link % target;
}
}
}
break;
}
default:
abort();
}
}
static void opPrintEnv(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
if (opArgs.size() != 1) {
throw UsageError("'--print-env' requires one derivation store path");
}
Path drvPath = opArgs.front();
Derivation drv = store->derivationFromPath(drvPath);
/* Print each environment variable in the derivation in a format
that can be sourced by the shell. */
for (auto& i : drv.env) {
cout << format("export %1%; %1%=%2%\n") % i.first % shellEscape(i.second);
}
/* Also output the arguments. This doesn't preserve whitespace in
arguments. */
cout << "export _args; _args='";
bool first = true;
for (auto& i : drv.args) {
if (!first) {
cout << ' ';
}
first = false;
cout << shellEscape(i);
}
cout << "'\n";
}
static void opReadLog(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
RunPager pager;
for (auto& i : opArgs) {
auto path = store->followLinksToStorePath(i);
auto log = store->getBuildLog(path);
if (!log) {
throw Error("build log of derivation '%s' is not available", path);
}
std::cout << *log;
}
}
static void opDumpDB(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
if (!opArgs.empty()) {
for (auto& i : opArgs) {
i = store->followLinksToStorePath(i);
}
for (auto& i : opArgs) {
cout << store->makeValidityRegistration({i}, true, true);
}
} else {
PathSet validPaths = store->queryAllValidPaths();
for (auto& i : validPaths) {
cout << store->makeValidityRegistration({i}, true, true);
}
}
}
static void registerValidity(bool reregister, bool hashGiven,
bool canonicalise) {
ValidPathInfos infos;
while (true) {
ValidPathInfo info = decodeValidPathInfo(cin, hashGiven);
if (info.path.empty()) {
break;
}
if (!store->isValidPath(info.path) || reregister) {
/* !!! races */
if (canonicalise) {
canonicalisePathMetaData(info.path, -1);
}
if (!hashGiven) {
HashResult hash = hashPath(htSHA256, info.path);
info.narHash = hash.first;
info.narSize = hash.second;
}
infos.push_back(info);
}
}
ensureLocalStore()->registerValidPaths(infos);
}
static void opLoadDB(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
registerValidity(true, true, false);
}
static void opRegisterValidity(Strings opFlags, Strings opArgs) {
bool reregister = false; // !!! maybe this should be the default
bool hashGiven = false;
for (auto& i : opFlags) {
if (i == "--reregister") {
reregister = true;
} else if (i == "--hash-given") {
hashGiven = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
registerValidity(reregister, hashGiven, true);
}
static void opCheckValidity(Strings opFlags, Strings opArgs) {
bool printInvalid = false;
for (auto& i : opFlags) {
if (i == "--print-invalid") {
printInvalid = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
for (auto& i : opArgs) {
Path path = store->followLinksToStorePath(i);
if (!store->isValidPath(path)) {
if (printInvalid) {
cout << format("%1%\n") % path;
} else {
throw Error(format("path '%1%' is not valid") % path);
}
}
}
}
static void opGC(Strings opFlags, Strings opArgs) {
bool printRoots = false;
GCOptions options;
options.action = GCOptions::gcDeleteDead;
GCResults results;
/* Do what? */
for (auto i = opFlags.begin(); i != opFlags.end(); ++i) {
if (*i == "--print-roots") {
printRoots = true;
} else if (*i == "--print-live") {
options.action = GCOptions::gcReturnLive;
} else if (*i == "--print-dead") {
options.action = GCOptions::gcReturnDead;
} else if (*i == "--delete") {
options.action = GCOptions::gcDeleteDead;
} else if (*i == "--max-freed") {
auto maxFreed = getIntArg<long long>(*i, i, opFlags.end(), true);
options.maxFreed = maxFreed >= 0 ? maxFreed : 0;
} else {
throw UsageError(format("bad sub-operation '%1%' in GC") % *i);
}
}
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
if (printRoots) {
Roots roots = store->findRoots(false);
std::set<std::pair<Path, Path>> roots2;
// Transpose and sort the roots.
for (auto& [target, links] : roots) {
for (auto& link : links) {
roots2.emplace(link, target);
}
}
for (auto& [link, target] : roots2) {
std::cout << link << " -> " << target << "\n";
}
}
else {
PrintFreed freed(options.action == GCOptions::gcDeleteDead, results);
store->collectGarbage(options, results);
if (options.action != GCOptions::gcDeleteDead) {
for (auto& i : results.paths) {
cout << i << std::endl;
}
}
}
}
/* Remove paths from the Nix store if possible (i.e., if they do not
have any remaining referrers and are not reachable from any GC
roots). */
static void opDelete(Strings opFlags, Strings opArgs) {
GCOptions options;
options.action = GCOptions::gcDeleteSpecific;
for (auto& i : opFlags) {
if (i == "--ignore-liveness") {
options.ignoreLiveness = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
for (auto& i : opArgs) {
options.pathsToDelete.insert(store->followLinksToStorePath(i));
}
GCResults results;
PrintFreed freed(true, results);
store->collectGarbage(options, results);
}
/* Dump a path as a Nix archive. The archive is written to standard
output. */
static void opDump(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
if (opArgs.size() != 1) {
throw UsageError("only one argument allowed");
}
FdSink sink(STDOUT_FILENO);
std::string path = *opArgs.begin();
dumpPath(path, sink);
sink.flush();
}
/* Restore a value from a Nix archive. The archive is read from
standard input. */
static void opRestore(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
if (opArgs.size() != 1) {
throw UsageError("only one argument allowed");
}
FdSource source(STDIN_FILENO);
restorePath(*opArgs.begin(), source);
}
static void opExport(Strings opFlags, Strings opArgs) {
for (auto& i : opFlags) {
throw UsageError(format("unknown flag '%1%'") % i);
}
for (auto& i : opArgs) {
i = store->followLinksToStorePath(i);
}
FdSink sink(STDOUT_FILENO);
store->exportPaths(opArgs, sink);
sink.flush();
}
static void opImport(Strings opFlags, Strings opArgs) {
for (auto& i : opFlags) {
throw UsageError(format("unknown flag '%1%'") % i);
}
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
FdSource source(STDIN_FILENO);
Paths paths = store->importPaths(source, nullptr, NoCheckSigs);
for (auto& i : paths) {
cout << format("%1%\n") % i << std::flush;
}
}
/* Initialise the Nix databases. */
static void opInit(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("unknown flag");
}
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
/* Doesn't do anything right now; database tables are initialised
automatically. */
}
/* Verify the consistency of the Nix environment. */
static void opVerify(Strings opFlags, Strings opArgs) {
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
bool checkContents = false;
RepairFlag repair = NoRepair;
for (auto& i : opFlags) {
if (i == "--check-contents") {
checkContents = true;
} else if (i == "--repair") {
repair = Repair;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
if (store->verifyStore(checkContents, repair)) {
LOG(WARNING) << "not all errors were fixed";
throw Exit(1);
}
}
/* Verify whether the contents of the given store path have not changed. */
static void opVerifyPath(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("no flags expected");
}
int status = 0;
for (auto& i : opArgs) {
Path path = store->followLinksToStorePath(i);
LOG(INFO) << "checking path '" << path << "'...";
auto info = store->queryPathInfo(path);
HashSink sink(info->narHash.type);
store->narFromPath(path, sink);
auto current = sink.finish();
if (current.first != info->narHash) {
LOG(ERROR) << "path '" << path << "' was modified! expected hash '"
<< info->narHash.to_string() << "', got '"
<< current.first.to_string() << "'";
status = 1;
}
}
throw Exit(status);
}
/* Repair the contents of the given path by redownloading it using a
substituter (if available). */
static void opRepairPath(Strings opFlags, Strings opArgs) {
if (!opFlags.empty()) {
throw UsageError("no flags expected");
}
for (auto& i : opArgs) {
Path path = store->followLinksToStorePath(i);
ensureLocalStore()->repairPath(path);
}
}
/* Optimise the disk space usage of the Nix store by hard-linking
files with the same contents. */
static void opOptimise(Strings opFlags, Strings opArgs) {
if (!opArgs.empty() || !opFlags.empty()) {
throw UsageError("no arguments expected");
}
store->optimiseStore();
}
/* Serve the nix store in a way usable by a restricted ssh user. */
static void opServe(Strings opFlags, Strings opArgs) {
bool writeAllowed = false;
for (auto& i : opFlags) {
if (i == "--write") {
writeAllowed = true;
} else {
throw UsageError(format("unknown flag '%1%'") % i);
}
}
if (!opArgs.empty()) {
throw UsageError("no arguments expected");
}
FdSource in(STDIN_FILENO);
FdSink out(STDOUT_FILENO);
/* Exchange the greeting. */
unsigned int magic = readInt(in);
if (magic != SERVE_MAGIC_1) {
throw Error("protocol mismatch");
}
out << SERVE_MAGIC_2 << SERVE_PROTOCOL_VERSION;
out.flush();
unsigned int clientVersion = readInt(in);
auto getBuildSettings = [&]() {
// FIXME: changing options here doesn't work if we're
// building through the daemon.
settings.keepLog = false;
settings.useSubstitutes = false;
settings.maxSilentTime = readInt(in);
settings.buildTimeout = readInt(in);
if (GET_PROTOCOL_MINOR(clientVersion) >= 2) {
settings.maxLogSize = readNum<unsigned long>(in);
}
if (GET_PROTOCOL_MINOR(clientVersion) >= 3) {
settings.buildRepeat = readInt(in);
settings.enforceDeterminism = readInt(in) != 0u;
settings.runDiffHook = true;
}
settings.printRepeatedBuilds = false;
};
while (true) {
ServeCommand cmd{};
try {
cmd = static_cast<ServeCommand>(readInt(in));
} catch (EndOfFile& e) {
break;
}
switch (cmd) {
case cmdQueryValidPaths: {
bool lock = readInt(in) != 0u;
bool substitute = readInt(in) != 0u;
auto paths = readStorePaths<PathSet>(*store, in);
if (lock && writeAllowed) {
for (auto& path : paths) {
store->addTempRoot(path);
}
}
/* If requested, substitute missing paths. This
implements nix-copy-closure's --use-substitutes
flag. */
if (substitute && writeAllowed) {
/* Filter out .drv files (we don't want to build anything). */
PathSet paths2;
for (auto& path : paths) {
if (!isDerivation(path)) {
paths2.insert(path);
}
}
unsigned long long downloadSize = 0;
unsigned long long narSize = 0;
PathSet willBuild;
PathSet willSubstitute;
PathSet unknown;
store->queryMissing(PathSet(paths2.begin(), paths2.end()), willBuild,
willSubstitute, unknown, downloadSize, narSize);
/* FIXME: should use ensurePath(), but it only
does one path at a time. */
if (!willSubstitute.empty()) {
try {
store->buildPaths(willSubstitute);
} catch (Error& e) {
LOG(WARNING) << e.msg();
}
}
}
out << store->queryValidPaths(paths);
break;
}
case cmdQueryPathInfos: {
auto paths = readStorePaths<PathSet>(*store, in);
// !!! Maybe we want a queryPathInfos?
for (auto& i : paths) {
try {
auto info = store->queryPathInfo(i);
out << info->path << info->deriver << info->references;
// !!! Maybe we want compression?
out << info->narSize // downloadSize
<< info->narSize;
if (GET_PROTOCOL_MINOR(clientVersion) >= 4) {
out << (info->narHash ? info->narHash.to_string() : "")
<< info->ca << info->sigs;
}
} catch (InvalidPath&) {
}
}
out << "";
break;
}
case cmdDumpStorePath:
store->narFromPath(readStorePath(*store, in), out);
break;
case cmdImportPaths: {
if (!writeAllowed) {
throw Error("importing paths is not allowed");
}
store->importPaths(in, nullptr,
NoCheckSigs); // FIXME: should we skip sig checking?
out << 1; // indicate success
break;
}
case cmdExportPaths: {
readInt(in); // obsolete
store->exportPaths(readStorePaths<Paths>(*store, in), out);
break;
}
case cmdBuildPaths: {
if (!writeAllowed) {
throw Error("building paths is not allowed");
}
auto paths = readStorePaths<PathSet>(*store, in);
getBuildSettings();
try {
MonitorFdHup monitor(in.fd);
store->buildPaths(paths);
out << 0;
} catch (Error& e) {
assert(e.status);
out << e.status << e.msg();
}
break;
}
case cmdBuildDerivation: { /* Used by hydra-queue-runner. */
if (!writeAllowed) {
throw Error("building paths is not allowed");
}
Path drvPath = readStorePath(*store, in); // informational only
BasicDerivation drv;
readDerivation(in, *store, drv);
getBuildSettings();
MonitorFdHup monitor(in.fd);
auto status = store->buildDerivation(drvPath, drv);
out << status.status << status.errorMsg;
if (GET_PROTOCOL_MINOR(clientVersion) >= 3) {
out << status.timesBuilt
<< static_cast<uint64_t>(status.isNonDeterministic)
<< status.startTime << status.stopTime;
}
break;
}
case cmdQueryClosure: {
bool includeOutputs = readInt(in) != 0u;
PathSet closure;
store->computeFSClosure(readStorePaths<PathSet>(*store, in), closure,
false, includeOutputs);
out << closure;
break;
}
case cmdAddToStoreNar: {
if (!writeAllowed) {
throw Error("importing paths is not allowed");
}
ValidPathInfo info;
info.path = readStorePath(*store, in);
in >> info.deriver;
if (!info.deriver.empty()) {
store->assertStorePath(info.deriver);
}
info.narHash = Hash(readString(in), htSHA256);
info.references = readStorePaths<PathSet>(*store, in);
in >> info.registrationTime >> info.narSize >> info.ultimate;
info.sigs = readStrings<StringSet>(in);
in >> info.ca;
if (info.narSize == 0) {
throw Error("narInfo is too old and missing the narSize field");
}
SizedSource sizedSource(in, info.narSize);
store->addToStore(info, sizedSource, NoRepair, NoCheckSigs);
// consume all the data that has been sent before continuing.
sizedSource.drainAll();
out << 1; // indicate success
break;
}
default:
throw Error(format("unknown serve command %1%") % cmd);
}
out.flush();
}
}
static void opGenerateBinaryCacheKey(Strings opFlags, Strings opArgs) {
for (auto& i : opFlags) {
throw UsageError(format("unknown flag '%1%'") % i);
}
if (opArgs.size() != 3) {
throw UsageError("three arguments expected");
}
auto i = opArgs.begin();
std::string keyName = *i++;
std::string secretKeyFile = *i++;
std::string publicKeyFile = *i++;
#if HAVE_SODIUM
if (sodium_init() == -1) {
throw Error("could not initialise libsodium");
}
unsigned char pk[crypto_sign_PUBLICKEYBYTES];
unsigned char sk[crypto_sign_SECRETKEYBYTES];
if (crypto_sign_keypair(pk, sk) != 0) {
throw Error("key generation failed");
}
writeFile(publicKeyFile,
keyName + ":" +
absl::Base64Escape(std::string(reinterpret_cast<char*>(pk),
crypto_sign_PUBLICKEYBYTES)));
umask(0077);
writeFile(secretKeyFile,
keyName + ":" +
absl::Base64Escape(std::string(reinterpret_cast<char*>(sk),
crypto_sign_SECRETKEYBYTES)));
#else
throw Error(
"Nix was not compiled with libsodium, required for signed binary cache "
"support");
#endif
}
static void opVersion(Strings opFlags, Strings opArgs) {
printVersion("nix-store");
}
/* Scan the arguments; find the operation, set global flags, put all
other flags in a list, and put all other arguments in another
list. */
static int _main(int argc, char** argv) {
{
Strings opFlags;
Strings opArgs;
Operation op = nullptr;
parseCmdLine(argc, argv,
[&](Strings::iterator& arg, const Strings::iterator& end) {
Operation oldOp = op;
if (*arg == "--help") {
showManPage("nix-store");
} else if (*arg == "--version") {
op = opVersion;
} else if (*arg == "--realise" || *arg == "--realize" ||
*arg == "-r") {
op = opRealise;
} else if (*arg == "--add" || *arg == "-A") {
op = opAdd;
} else if (*arg == "--add-fixed") {
op = opAddFixed;
} else if (*arg == "--print-fixed-path") {
op = opPrintFixedPath;
} else if (*arg == "--delete") {
op = opDelete;
} else if (*arg == "--query" || *arg == "-q") {
op = opQuery;
} else if (*arg == "--print-env") {
op = opPrintEnv;
} else if (*arg == "--read-log" || *arg == "-l") {
op = opReadLog;
} else if (*arg == "--dump-db") {
op = opDumpDB;
} else if (*arg == "--load-db") {
op = opLoadDB;
} else if (*arg == "--register-validity") {
op = opRegisterValidity;
} else if (*arg == "--check-validity") {
op = opCheckValidity;
} else if (*arg == "--gc") {
op = opGC;
} else if (*arg == "--dump") {
op = opDump;
} else if (*arg == "--restore") {
op = opRestore;
} else if (*arg == "--export") {
op = opExport;
} else if (*arg == "--import") {
op = opImport;
} else if (*arg == "--init") {
op = opInit;
} else if (*arg == "--verify") {
op = opVerify;
} else if (*arg == "--verify-path") {
op = opVerifyPath;
} else if (*arg == "--repair-path") {
op = opRepairPath;
} else if (*arg == "--optimise" || *arg == "--optimize") {
op = opOptimise;
} else if (*arg == "--serve") {
op = opServe;
} else if (*arg == "--generate-binary-cache-key") {
op = opGenerateBinaryCacheKey;
} else if (*arg == "--add-root") {
gcRoot = absPath(getArg(*arg, arg, end));
} else if (*arg == "--indirect") {
indirectRoot = true;
} else if (*arg == "--no-output") {
noOutput = true;
} else if (*arg != "" && arg->at(0) == '-') {
opFlags.push_back(*arg);
if (*arg == "--max-freed" || *arg == "--max-links" ||
*arg == "--max-atime") { /* !!! hack */
opFlags.push_back(getArg(*arg, arg, end));
}
} else {
opArgs.push_back(*arg);
}
if ((oldOp != nullptr) && oldOp != op) {
throw UsageError("only one operation may be specified");
}
return true;
});
if (op == nullptr) {
throw UsageError("no operation specified");
}
if (op != opDump && op != opRestore) { /* !!! hack */
store = openStore();
}
op(opFlags, opArgs);
return 0;
}
}
static RegisterLegacyCommand s1("nix-store", _main);
